Filter media with fibrillated fibers

Abstract

Filter media suitable for various applications (e.g., hydraulic) and related components, systems, and methods associated therewith are described. The filter media may include a fiber web having a mixture of glass fibers and fibers that are fibrillated. The fibrillated fibers, for example, may be formed of lyocell.

1 . (canceled) 
     
     
         2 . A filter media comprising:
 a fiber web including glass fibers and fibrillated fibers, the fiber web having a basis weight of between about 10 and about 1000 g/m2 and a thickness of between about 0.10 mm and about 50.0 mm, wherein the average Canadian Standard Freeness level of fibrillation of the lyocell fibers is between 45 and 850.   
     
     
         3 . The filter media of  claim 2 , wherein the average Canadian Standard Freeness level of fibrillation is between about 100 and about 600. 
     
     
         4 . The filter media of  claim 1 , wherein the fibrillated fibers comprise between about 5% and about 60% by weight of the fiber web. 
     
     
         5 . The filter media of  claim 4 , wherein the fibrillated fibers comprise between about 5% and about 30% by weight of the fiber web. 
     
     
         6 . The filter media of  claim 2 , further comprising synthetic fibers other than lyocell. 
     
     
         7 . The filter media of  claim 2 , wherein the glass fibers comprise between about 40% and about 90% by weight of the fiber web. 
     
     
         8 . The filter media of  claim 2 , wherein the glass fibers comprise chopped strand fibers, wherein the chopped strand fibers comprise less than about 30% by weight of the fiber web. 
     
     
         9 . The filter media of  claim 2 , wherein the glass fibers comprise microglass fibers, wherein the microglass fibers comprise between about 40% and about 90% by weight of the fiber web. 
     
     
         10 . The filter media of  claim 2 , wherein the filter media is pleated. 
     
     
         11 . The filter media of  claim 2 , wherein the filter media is wrapped around an inner substrate. 
     
     
         12 . The filter media of  claim 2 , wherein the fiber web has a dust holding capacity of greater than about 50 g/m 2 . 
     
     
         13 . The filter media of  claim 2 , wherein the fiber web has a tensile elongation in a cross-machine direction of greater than about 1%. 
     
     
         14 . The filter media of  claim 2 , wherein the fiber web has a tensile elongation in a machine direction of greater than about 0.8%. 
     
     
         15 . The filter media of  claim 2 , wherein the fiber web has a Schopper burst strength of greater than about 15 kPa. 
     
     
         16 . The filter media of  claim 2 , wherein the fiber web has a tensile strength in a cross-machine direction of greater than about 3 N/15 mm. 
     
     
         17 . The filter media of  claim 2 , wherein the fiber web has a tensile strength in a machine direction of greater than about 4 N/15 mm. 
     
     
         18 . The filter media of  claim 2 , wherein the fiber web comprises a beta efficiency ratio of greater than about 100 for particles having an average diameter of greater than about 1 micron. 
     
     
         19 . A filter element comprising the filter media of  claim 1 . 
     
     
         20 . A filter media comprising:
 a fiber web including glass fibers and fibrillated fibers,   wherein the fiber web has a beta efficiency ratio of greater than about 100 for particles having an average diameter of greater than about 1 micron and the fiber web has a dust holding capacity of greater than about 50 g/m 2 .   
     
     
         21 . A filter media comprising:
 a fiber web including a plurality of glass fibers and a plurality of fibrillated fibers, wherein the filter media has a tensile elongation in a cross-machine direction of greater than about 1%.